Results 151 to 160 of about 16,135 (207)
Double earth fault effects in presence of interconnected earth electrodes
IET Conference Publications, 2009 The paper presents a study on the effects of double earth faults in Medium Voltage (MV) networks, in presence of electrical interconnection of the earthing systems of the secondary substations. The aim of the paper is to propose a circuit model and to find general conclusions about the effects of double earth faults in presence of interconnected ...
RIVA SANSEVERINO, Eleonora +2 more
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Nickel–rare earth electrodes for sodium borohydride electrooxidation
Electrochimica Acta, 2016 Binary alloys of nickel (Ni) and dysprosium (Dy) or samarium (Sm) of different composition were prepared. Their electrocatalytic activity in respect to borohydride oxidation in alkaline medium was investigated by cyclic voltammetry, chronoamperometry and chronopotentiometry. It was correlated to their morphological and structural properties examined by
Santos, DMF +6 more
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Rare earth ion selective electrodes
Electroanalysis, 1993AbstractIn this article, we report the rare earth ion selective electrodes developed in our laboratory. Rare earth containing functional copolymers, rare earth oxides, and chelates have been used as active materials. Methods for preparing raw materials, behavior of electrodes, and application of rare earth ion selective electrodes in flow injection ...
Erkang Wang
exaly +2 more sources
Silver(I)-selective electrodes based on rare earth element double-decker porphyrins
Sensors and Actuators B: Chemical, 2020 Various double-decker porphyrins accommodating rare earth elements (Sm, Tb, Y) were investigated as ionophores in potentiometric ion sensors. The studied ion-selective electrodes based on double-decker porphyrins were primarily selective to Ag ions. The
Narender Kumar Joon +2 more
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Elements, 2020
The oxidation–reduction (‘redox’) state is an important intensive property of any geologic system and is typically measured (and reported) as either the redox potential (Eh) or the oxygen fugacity (fO2). These two concepts cover the whole spectrum of geologic systems: from low-temperature aqueous and sedimentary systems to high-temperature rock-forming
Cicconi, Maria Rita +3 more
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The oxidation–reduction (‘redox’) state is an important intensive property of any geologic system and is typically measured (and reported) as either the redox potential (Eh) or the oxygen fugacity (fO2). These two concepts cover the whole spectrum of geologic systems: from low-temperature aqueous and sedimentary systems to high-temperature rock-forming
Cicconi, Maria Rita +3 more
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Platinum–rare earth electrodes for hydrogen evolution in alkaline water electrolysis
International Journal of Hydrogen Energy, 2013 In the new “Hydrogen Economy” concept, water electrolysis is considered one of the most promising technologies for hydrogen production. Novel electrocatalytic materials for the hydrogen electrode are being actively investigated to improve the energy ...
Diogo M F Santos +2 more
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The resistance of earth electrodes
Journal of the Institution of Electrical Engineers, 1933This paper, which is an abridgement of a report† prepared by the E.R.A., deals briefly with the most important aspects of the resistance of electrodes used for earthing electrical installations and apparatus. After comparing the practice in various countries, details are given of the effect of the resistivity of the soil and the size and lay-out of ...
P.D. Morgan, H.G. Taylor
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Performance of Earthing Systems for Different Earth Electrode Configurations
IEEE Transactions on Industry Applications, 2015Changes of behavior of earthing systems under high impulse conditions from its steady-state conditions have been found to occur in many studies. There are many factors that are thought to cause these changes. However, little studies so far have been conducted on the effects of earth electrode dimensions and configurations, particularly at field sites ...
Mohamed Shahriman Mohamed Yunus +3 more
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Journal of Electronics and Advanced Electrical Engineering, 2021
An algorithm is proposed in this paper for calculating the impulse earthing resistances of vertical earthing electrodes. The proposed algorithm employs the average potential method to derive the formula of the low current earthing resistance. Unlike the previous algorithm, the soil ionization effect under high impulse current is taken into account by ...
Yongzheng Zhang, Xiaoqing Zhang
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An algorithm is proposed in this paper for calculating the impulse earthing resistances of vertical earthing electrodes. The proposed algorithm employs the average potential method to derive the formula of the low current earthing resistance. Unlike the previous algorithm, the soil ionization effect under high impulse current is taken into account by ...
Yongzheng Zhang, Xiaoqing Zhang
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